Renamed "symbols" to "internalized strings" throughout the code base,

src/log-utils.cc

Index: src/log-utils.cc
diff --git a/src/log-utils.cc b/src/log-utils.cc
index d8d92cbe211607f03e2a6f131f6f2f481b47f023..830c3daa9cce16b2ab856abfe1eba84f011ab934 100644
--- a/src/log-utils.cc
+++ b/src/log-utils.cc
@@ -262,7 +262,7 @@ void LogMessageBuilder::AppendDetailed(String* str, bool show_impl_info) {
     Append(str->IsOneByteRepresentation() ? 'a' : '2');
     if (StringShape(str).IsExternal())
       Append('e');
-    if (StringShape(str).IsSymbol())
+    if (StringShape(str).IsInternalized())
       Append('#');
     Append(":%i:", str->length());
   }